Set colours and fonts for all elements of the generic wxSearchCtrl.

Derive generic wxSearchCtrl from wxCompositeWindow<> to ensure that calls to
its Set{Fore,Back}groundColour() are propagated to all its children, otherwise
they applied only to the composite control itself but not e.g. its text part.

Also update the bitmaps when the background colour changes to ensure that it
appears as transparent.

Closes #13428.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@68911 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/srchctlg.cpp

@@ -296,12 +296,7 @@ bool wxSearchCtrl::Create(wxWindow *parent, wxWindowID id,
                                         m_cancelBitmap);
 
     SetForegroundColour( m_text->GetForegroundColour() );
-    m_searchButton->SetForegroundColour( m_text->GetForegroundColour() );
-    m_cancelButton->SetForegroundColour( m_text->GetForegroundColour() );
-
     SetBackgroundColour( m_text->GetBackgroundColour() );
-    m_searchButton->SetBackgroundColour( m_text->GetBackgroundColour() );
-    m_cancelButton->SetBackgroundColour( m_text->GetBackgroundColour() );
 
     RecalcBitmaps();
 
@@ -500,6 +495,14 @@ void wxSearchCtrl::LayoutControls(int x, int y, int width, int height)
                             y + ICON_OFFSET - 1, sizeCancel.x, height);
 }
 
+wxWindowList wxSearchCtrl::GetCompositeWindowParts() const
+{
+    wxWindowList parts;
+    parts.push_back(m_text);
+    parts.push_back(m_searchButton);
+    parts.push_back(m_cancelButton);
+    return parts;
+}
 
 // accessors
 // ---------
@@ -750,13 +753,25 @@ void wxSearchCtrl::SetEditable(bool editable)
 
 bool wxSearchCtrl::SetFont(const wxFont& font)
 {
-    bool result = wxSearchCtrlBase::SetFont(font);
-    if ( result && m_text )
-    {
-        result = m_text->SetFont(font);
-    }
+    if ( !wxSearchCtrlBase::SetFont(font) )
+        return false;
+
+    // Recreate the bitmaps as their size may have changed.
     RecalcBitmaps();
-    return result;
+
+    return true;
+}
+
+bool wxSearchCtrl::SetBackgroundColour(const wxColour& colour)
+{
+    if ( !wxSearchCtrlBase::SetBackgroundColour(colour) )
+        return false;
+
+    // When the background changes, re-render the bitmaps so that the correct
+    // colour shows in their "transparent" area.
+    RecalcBitmaps();
+
+    return true;
 }
 
 // search control generic only